Just Code Challenge -- I'm a little late, but it's still a good idea. The idea is for you to make one program (or app) a week throughout the summer. These apps don’t have to do anything fancy, although they should do something that is at least a little bit useful or fun. Any type of app counts—desktop, iOS, or web.

Causal Inference Book -- The book is divided in three parts of increasing difficulty: causal inference without models, causal inference with models, and causal inference from complex longitudinal data.

scrty.io -- A collection of information security essays and links to help growing teams manage risks.

Nat Torkington has been active in web development since the early days of the web. He wrote the bestselling Perl Cookbook, and chaired conferences for O'Reilly Media for a decade. During his time at O'Reilly Media, Nat was an editor and then became a trend-spotter for the O'Reilly Radar group, identifying the topics to build events and books around. He has worked in areas as diverse as networking, publishing, science, edtech, and NLP. He now lives in New Zealand, where he runs Kiwi Foo Camp and helps startups grow.